| Diagram | Fig. 30 — CARBURETTER, T90, T100S AND T100C · ref 12 |
| Subsystem | fuel |
| Listed in parts books | 1969 |
Main jet (size 160) (376/100)
Amal carburetor main jet, size 160, listed for 1969 T90/T100S/T100C/T100T/T100R carb setups.
This is a main jet for an Amal carburetor, sized 160, and turns up in the parts book under the 376/100 reference number as well as 99-0445. The main jet controls fuel delivery through the mid-to-upper throttle range, so if a bike is running rich or lean once past idle and the smaller jets and needle are already sorted, the main jet is the next thing to check.
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The catalog places this jet in the carburetor figures for the T90, T100S, T100C, T100T, and T100R, all from the 1969 model year listings we have on file. If you're jetting a different year or model, don't assume this size carries over — main jet sizing is specific to the carb body and application, so check your own carb before ordering.
It's a small, inexpensive part to keep a couple of on the shelf in various sizes if you're tuning a carb, since jetting often takes some trial and error to get right for a given exhaust, air filter, and altitude combination.
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